This heat exchanger measures 21 1/4 in Long and 5 in in diameter it is quite large and heavy.  As this came with a Dodge V10 8 L shown in last photo. Engine is for sale also, but this listing is for the heat exchanger only.

Th is a solid copper heavy brand new heat exchanger that's been sitting around the shop for years it's never been installed or used it is brand new has a little dent and a few scratches on the bottleneck but otherwise brand new.

The product is a brand new old stock heat exchanger from R&D Enterprises, designed for inboard boat engines. It comes with a 90-day warranty and is manufactured in the United States.